Did you learn it by scrolling down on the front page and looking at the text below the list of moderators? I sincerely hope you aren't trusted to run a public community ever again if your first reaction is to start an off-site proposal to shut a community down.
So the only thing holding you back from deleting a subreddit with tons of information, 25.000 subscribed users and what looks like a rather active and healthy discussion isn't that it would be a dick move to both golang in general and the community, but that you're not actually the owner.
Not attaching your brand to poor service is also part of managing a community.
If AWS started MITMing client HTTP connections and injecting code, would you be surprised people moved their official websites off the platform, even if a lot of people knew the old IP address?
That's not childish, that's not doing business with bad partners, and Im not convinced a space that started as official could ever truly be made "non-official".
What I mean is that the subreddit doesn't belong to bradfitz, or Google, or the golang creators.
It has never started as official because the creator was /u/uriel. The Google guys may have joined after, but the fact is that it is not their community. They're not even paying a single dime for it.
If AWS started MITMing my connections, absolutely, I would drop it. But the analogy doesn't hold because /r/golang isn't bradfitz's subreddit.
The proper and only response would be to drop moderatorship, leaving in a thread his reasons, and leaving /r/golang as it is. As it stands, the only thing stopping him from doing that is that the he's not the original owner.
And, you could also argue that when a community reaches a certain size, it doesn't belong to you anymore. It belongs to that community. To delete it is petty and childish.
I thought our subreddit was an official space that we created. It turns out we didn't create it, so it's not ours to delete.
I'm now proposing we just make it unofficial.